Broadband fitting of the disk to the optical/UV/X-ray data for a = 0.998 (upper panel, best fit log M_BH/M_⊙ = 7.39) and a = 0 (lower panel, best fit log M_BH/M_⊙ = 6.55). The red solid line represents the models OPTXAGNF with the best-fitting values given in Table 2, and the Galactic extinction TBABS and the HST data shift applied to the data is not included here, which explains the departure of the data/model in soft X-rays and HST disk plot. The blue, green, and pink dashed lines represent the disk blackbody, soft Compton, and hard Compton components, respectively.